I stand by what I said. It takes seconds. Longer than I flash the lights for anyway. Gives you maybe one good and extremely short flash. I've tried it and there's no appreciable light. I'm concerned about the ignitor and ballast components.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim